Found on southern and western coasts in shallow water, the Tompot Blenny or Blennius gattorugine is readily identified by its fleshy, multi-branched head tentacles. Maximum length about 25cms. Lives in holes and cracks and is very inquisitive. I found this one in only three metres of water when it stuck its head out of its hole to check me over.
Tompot Blennies are sometimes confused with Yarrell's Blennies but the latter's head tentacles are more bushy than branched, it is more eel like in shape and has none of the bright colours on its head that the Tompot has. See the separate photograph of Yarrell's Blenny for the difference.

Location: Plymouth